Brown v. Board of Education marked the NAACP’s greatest success in its fight to

Brown v. Board of Education ruled that racial segregation in public schools was unconstitutional, overturning the idea that separate schools could be equal. This was a major success in the NAACP’s campaign for equality in segregated schools. The ruling did not immediately end segregation in every part of public education, so A is more accurate than C.

AI-written and checked against the verified answer.